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219 lines
11 KiB
C
219 lines
11 KiB
C
/** @file
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EFI IPSEC Protocol Definition
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The EFI_IPSEC_PROTOCOL is used to abstract the ability to deal with the individual
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packets sent and received by the host and provide packet-level security for IP
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datagram.
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The EFI_IPSEC2_PROTOCOL is used to abstract the ability to deal with the individual
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packets sent and received by the host and provide packet-level security for IP
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datagram. In addition, it supports the Option (extension header) processing in
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IPsec which doesn't support in EFI_IPSEC_PROTOCOL. It is also recommended to
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use EFI_IPSEC2_PROTOCOL instead of EFI_IPSEC_PROTOCOL especially for IPsec Tunnel
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Mode.
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Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference:
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The EFI_IPSEC2_PROTOCOL is introduced in UEFI Specification 2.3D.
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**/
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#ifndef __EFI_IPSEC_PROTOCOL_H__
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#define __EFI_IPSEC_PROTOCOL_H__
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#include <Protocol/IpSecConfig.h>
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#define EFI_IPSEC_PROTOCOL_GUID \
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{ \
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0xdfb386f7, 0xe100, 0x43ad, {0x9c, 0x9a, 0xed, 0x90, 0xd0, 0x8a, 0x5e, 0x12 } \
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}
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#define EFI_IPSEC2_PROTOCOL_GUID \
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{ \
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0xa3979e64, 0xace8, 0x4ddc, {0xbc, 0x7, 0x4d, 0x66, 0xb8, 0xfd, 0x9, 0x77 } \
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}
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typedef struct _EFI_IPSEC_PROTOCOL EFI_IPSEC_PROTOCOL;
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typedef struct _EFI_IPSEC2_PROTOCOL EFI_IPSEC2_PROTOCOL;
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///
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/// EFI_IPSEC_FRAGMENT_DATA
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/// defines the instances of packet fragments.
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///
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typedef struct _EFI_IPSEC_FRAGMENT_DATA {
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UINT32 FragmentLength;
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VOID *FragmentBuffer;
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} EFI_IPSEC_FRAGMENT_DATA;
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/**
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Handles IPsec packet processing for inbound and outbound IP packets.
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The EFI_IPSEC_PROCESS process routine handles each inbound or outbound packet.
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The behavior is that it can perform one of the following actions:
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bypass the packet, discard the packet, or protect the packet.
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@param[in] This Pointer to the EFI_IPSEC_PROTOCOL instance.
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@param[in] NicHandle Instance of the network interface.
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@param[in] IpVer IPV4 or IPV6.
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@param[in, out] IpHead Pointer to the IP Header.
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@param[in] LastHead The protocol of the next layer to be processed by IPsec.
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@param[in] OptionsBuffer Pointer to the options buffer.
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@param[in] OptionsLength Length of the options buffer.
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@param[in, out] FragmentTable Pointer to a list of fragments.
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@param[in] FragmentCount Number of fragments.
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@param[in] TrafficDirection Traffic direction.
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@param[out] RecycleSignal Event for recycling of resources.
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@retval EFI_SUCCESS The packet was bypassed and all buffers remain the same.
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@retval EFI_SUCCESS The packet was protected.
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@retval EFI_ACCESS_DENIED The packet was discarded.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_IPSEC_PROCESS)(
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IN EFI_IPSEC_PROTOCOL *This,
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IN EFI_HANDLE NicHandle,
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IN UINT8 IpVer,
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IN OUT VOID *IpHead,
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IN UINT8 *LastHead,
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IN VOID *OptionsBuffer,
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IN UINT32 OptionsLength,
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IN OUT EFI_IPSEC_FRAGMENT_DATA **FragmentTable,
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IN UINT32 *FragmentCount,
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IN EFI_IPSEC_TRAFFIC_DIR TrafficDirection,
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OUT EFI_EVENT *RecycleSignal
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);
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///
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/// EFI_IPSEC_PROTOCOL
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/// provides the ability for securing IP communications by authenticating
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/// and/or encrypting each IP packet in a data stream.
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// EFI_IPSEC_PROTOCOL can be consumed by both the IPv4 and IPv6 stack.
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// A user can employ this protocol for IPsec package handling in both IPv4
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// and IPv6 environment.
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///
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struct _EFI_IPSEC_PROTOCOL {
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EFI_IPSEC_PROCESS Process; ///< Handle the IPsec message.
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EFI_EVENT DisabledEvent; ///< Event signaled when the interface is disabled.
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BOOLEAN DisabledFlag; ///< State of the interface.
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};
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/**
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Handles IPsec processing for both inbound and outbound IP packets. Compare with
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Process() in EFI_IPSEC_PROTOCOL, this interface has the capability to process
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Option(Extension Header).
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The EFI_IPSEC2_PROCESS process routine handles each inbound or outbound packet.
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The behavior is that it can perform one of the following actions:
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bypass the packet, discard the packet, or protect the packet.
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@param[in] This Pointer to the EFI_IPSEC2_PROTOCOL instance.
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@param[in] NicHandle Instance of the network interface.
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@param[in] IpVer IP version.IPv4 or IPv6.
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@param[in, out] IpHead Pointer to the IP Header it is either
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the EFI_IP4_HEADER or EFI_IP6_HEADER.
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On input, it contains the IP header.
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On output, 1) in tunnel mode and the
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traffic direction is inbound, the buffer
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will be reset to zero by IPsec; 2) in
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tunnel mode and the traffic direction
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is outbound, the buffer will reset to
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be the tunnel IP header.3) in transport
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mode, the related fielders (like payload
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length, Next header) in IP header will
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be modified according to the condition.
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@param[in, out] LastHead For IP4, it is the next protocol in IP
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header. For IP6 it is the Next Header
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of the last extension header.
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@param[in, out] OptionsBuffer On input, it contains the options
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(extensions header) to be processed by
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IPsec. On output, 1) in tunnel mode and
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the traffic direction is outbound, it
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will be set to NULL, and that means this
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contents was wrapped after inner header
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and should not be concatenated after
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tunnel header again; 2) in transport
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mode and the traffic direction is inbound,
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if there are IP options (extension headers)
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protected by IPsec, IPsec will concatenate
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the those options after the input options
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(extension headers); 3) on other situations,
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the output of contents of OptionsBuffer
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might be same with input's. The caller
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should take the responsibility to free
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the buffer both on input and on output.
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@param[in, out] OptionsLength On input, the input length of the options
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buffer. On output, the output length of
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the options buffer.
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@param[in, out] FragmentTable Pointer to a list of fragments. On input,
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these fragments contain the IP payload.
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On output, 1) in tunnel mode and the traffic
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direction is inbound, the fragments contain
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the whole IP payload which is from the
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IP inner header to the last byte of the
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packet; 2) in tunnel mode and the traffic
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direction is the outbound, the fragments
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contains the whole encapsulated payload
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which encapsulates the whole IP payload
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between the encapsulated header and
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encapsulated trailer fields. 3) in transport
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mode and the traffic direction is inbound,
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the fragments contains the IP payload
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which is from the next layer protocol to
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the last byte of the packet; 4) in transport
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mode and the traffic direction is outbound,
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the fragments contains the whole encapsulated
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payload which encapsulates the next layer
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protocol information between the encapsulated
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header and encapsulated trailer fields.
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@param[in, out] FragmentCount Number of fragments.
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@param[in] TrafficDirection Traffic direction.
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@param[out] RecycleSignal Event for recycling of resources.
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@retval EFI_SUCCESS The packet was processed by IPsec successfully.
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@retval EFI_ACCESS_DENIED The packet was discarded.
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@retval EFI_NOT_READY The IKE negotiation is invoked and the packet
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was discarded.
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@retval EFI_INVALID_PARAMETER One or more of following are TRUE:
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If OptionsBuffer is NULL;
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If OptionsLength is NULL;
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If FragmentTable is NULL;
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If FragmentCount is NULL.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_IPSEC_PROCESSEXT) (
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IN EFI_IPSEC2_PROTOCOL *This,
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IN EFI_HANDLE NicHandle,
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IN UINT8 IpVer,
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IN OUT VOID *IpHead,
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IN OUT UINT8 *LastHead,
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IN OUT VOID **OptionsBuffer,
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IN OUT UINT32 *OptionsLength,
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IN OUT EFI_IPSEC_FRAGMENT_DATA **FragmentTable,
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IN OUT UINT32 *FragmentCount,
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IN EFI_IPSEC_TRAFFIC_DIR TrafficDirection,
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OUT EFI_EVENT *RecycleSignal
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);
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///
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/// EFI_IPSEC2_PROTOCOL
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/// supports the Option (extension header) processing in IPsec which doesn't support
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/// in EFI_IPSEC_PROTOCOL. It is also recommended to use EFI_IPSEC2_PROTOCOL instead
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/// of EFI_IPSEC_PROTOCOL especially for IPsec Tunnel Mode.
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/// provides the ability for securing IP communications by authenticating and/or
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/// encrypting each IP packet in a data stream.
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///
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struct _EFI_IPSEC2_PROTOCOL {
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EFI_IPSEC_PROCESSEXT ProcessExt;
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EFI_EVENT DisabledEvent;
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BOOLEAN DisabledFlag;
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};
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extern EFI_GUID gEfiIpSecProtocolGuid;
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extern EFI_GUID gEfiIpSec2ProtocolGuid;
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#endif
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